However I think you can still see reviews without logging in.
Quite correct - I often just "look in" without logging in, then only log in if I want to post.
However, with the plethora of weird and wonderful pseudonyms (and some of masterful originality) I would think that (the Beeb being `the Beeb`) the programme will be so boring that listeners or viewers will be more amused by the pseudonyms themselves than particularly interested in any of the actual posts.
And unless (and indeed, even if) the Met. were to devote all of its resources, I doubt that the user names here are very likely to be tracked back to their owners.